IAR Embedded Workbench for RX 5.20IAR C/C++ DevelopmentThe preprocessorDescription of predefined preprocessor symbols__FPU__FPUIn this section: DescriptionAn integer that reflects the support for a hardware floating point unit. It is undefined when the option --fpu=none is used, otherwise it is defined. When defined, its value is 1.This symbol is available for compatibility with Renesas CC-RX.